Docker Execute Command in Container

Introduction

In this lab, you will be transported to the mysterious and ancient labyrinth where a ghost in the maze awaits your assistance. The background of the labyrinth as a challenging and perilous place needs no introduction, and your goal will be to navigate the ominous twists and turns to communicate with the spectral presence that haunts its passages and uncover the secrets it holds.

Skills Graph

Enter the Labyrinth

In this step, you must first conjure the entrance to the labyrinth using the dungeon container. The dungeon container is a mysterious and intriguing construct within the Docker realm. You will use the following code to summon the entrance to the labyrinth:

docker run -it -d --name dungeon alpine:latest

Communicate with the Ghost

Once inside the labyrinth, you will need to communicate with the ghost residing within. Use the exec command to send a message to the ethereal being. Execute the following command to achieve this:

docker exec dungeon sh -c "echo 'Greetings, phantom of the labyrinth!' > /tmp/message"

Summary

In this lab, you ventured into the enigmatic labyrinth, utilized the exec command in Docker to communicate with the ghostly inhabitant, and delved into the intricacies of container interactions. This immersive experience provides invaluable knowledge and skills in the realm of Docker exec commands. Through these challenges, you learn to navigate and communicate seamlessly within Docker containers, gaining proficiency and confidence in your Docker skills.